arch/arm/mach-omap2/clkt_iclk.c

   1 /*
   2  * OMAP2/3 interface clock control
   3  *
   4  * Copyright (C) 2011 Nokia Corporation
   5  * Paul Walmsley
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  */
  11 #undef DEBUG
  12
  13 #include <linux/kernel.h>
  14 #include <linux/clk-provider.h>
  15 #include <linux/io.h>
  16
  17
  18 #include "clock.h"
  19 #include "clock2xxx.h"
  20 #include "cm2xxx_3xxx.h"
  21 #include "cm-regbits-24xx.h"
  22
  23 /* Private functions */
  24
  25 /* XXX */
  26 void omap2_clkt_iclk_allow_idle(struct clk_hw_omap *clk)
  27 {
  28         u32 v;
  29         void __iomem *r;
  30
  31         r = (__force void __iomem *)
  32                 ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));
  33
  34         v = omap2_clk_readl(clk, r);
  35         v |= (1 << clk->enable_bit);
  36         omap2_clk_writel(v, clk, r);
  37 }
  38
  39 /* XXX */
  40 void omap2_clkt_iclk_deny_idle(struct clk_hw_omap *clk)
  41 {
  42         u32 v;
  43         void __iomem *r;
  44
  45         r = (__force void __iomem *)
  46                 ((__force u32)clk->enable_reg ^ (CM_AUTOIDLE ^ CM_ICLKEN));
  47
  48         v = omap2_clk_readl(clk, r);
  49         v &= ~(1 << clk->enable_bit);
  50         omap2_clk_writel(v, clk, r);
  51 }
  52
  53 /* Public data */
  54
  55 const struct clk_hw_omap_ops clkhwops_iclk = {
  56         .allow_idle     = omap2_clkt_iclk_allow_idle,
  57         .deny_idle      = omap2_clkt_iclk_deny_idle,
  58 };
  59
  60 const struct clk_hw_omap_ops clkhwops_iclk_wait = {
  61         .allow_idle     = omap2_clkt_iclk_allow_idle,
  62         .deny_idle      = omap2_clkt_iclk_deny_idle,
  63         .find_idlest    = omap2_clk_dflt_find_idlest,
  64         .find_companion = omap2_clk_dflt_find_companion,
  65 };
  66
  67
  68